Pignose amps

I am going to buy a Pignose amp for my bass so that I can have a small transportable one for jamming and for small coffee shop gigs later on. Is the standard small pignose amp for guitar decent for bass? I also heard about this Hog 20 and Hog 30 which are a little better at 20 and 30 watts. Or would the littler be just about as efficient at a lesser cost? WHich one should I get?